Description:

Stubs out a new model. Pass the model name, either CamelCased or
under_scored, and an optional list of attribute pairs as arguments.

Attribute pairs are field:type arguments specifying the
model's attributes. Timestamps are added by default, so you don't have to
specify them by hand as 'created_at:datetime updated_at:datetime'.

You don't have to think up every attribute up front, but it helps to
sketch out a few so you can start working with the model immediately.

This generator invokes your configured ORM and test framework, which
defaults to ActiveRecord and TestUnit.

Finally, if --parent option is given, it's used as superclass of the
created model. This allows you create Single Table Inheritance models.

If you pass a namespaced model name (e.g. admin/account or Admin::Account)
then the generator will create a module with a table_name_prefix method
to prefix the model's table name with the module name (e.g. admin_account)

Examples:

`rails generate model account`

    For ActiveRecord and TestUnit it creates:

        Model:      app/models/account.rb
        Test:       test/unit/account_test.rb
        Fixtures:   test/fixtures/accounts.yml
        Migration:  db/migrate/XXX_add_accounts.rb

`rails generate model post title:string body:text published:boolean`

    Creates a Post model with a string title, text body, and published flag.

`rails generate model admin/account`

    For ActiveRecord and TestUnit it creates:

        Module:     app/models/admin.rb
        Model:      app/models/admin/account.rb
        Test:       test/unit/admin/account_test.rb
        Fixtures:   test/fixtures/admin/accounts.yml
        Migration:  db/migrate/XXX_add_admin_accounts.rb